debugging, as applied to Web-cam video on PC

> Hey Josh,
>
> no problem.
>
> reportError
>
>     | error |
>     error := self decoderGetLastError.
>
>     self error: 'DirectShow: ', (ErrorCodes at: error ifAbsent:
> ['Unknown']).
>
> h
>
>  
> Haggai Goldfarb
> LiquidBits
> office: 617.945.5050
> cell: 818.648.5158
> [hidden email]
>
>
> ----- Original Message ----
> From: Joshua Gargus <[hidden email]>
> To: Howard Stearns <[hidden email]>
> Cc: haggai Goldfarb <[hidden email]>; Preston Austin
> <[hidden email]>
> Sent: Tuesday, February 20, 2007 2:40:28 PM
> Subject: Re: [croquet-consort] Re: [croquet-dev]
>
>
> What error is #reportError showing?
>
> Josh
>
>
> On Feb 20, 2007, at 11:31 AM, Howard Stearns wrote:
>
>  > ...
>  >
>  > I'll defer to the experts (Josh and Preston) on the camera. The  
>  > Windows camera plugin was written a few years ago by Squeaker  
>  > Yoshiki Ohshima. I know David Faught on the croquet-dev list has  
>  > also been working on issues with the Windows camera plugin. Last I  
>  > heard, he had it working except for uv-mapping. (He had a grid of  
>  > multiple copies of the image stretched across the surface.) I don't  
>  > know what errors he has encountered and fixed along the way.
>  >
>  > haggai Goldfarb wrote:
>  >> ... [using Web-cam video in KAT]...
>  >> One the webcam - I am getting an error from  
>  >> DShowVideoController>>reportError:
>  >> reportError
>  >>     | error |
>  >>     error := self decoderGetLastError.
>  >>     self error: 'DirectShow: ', (ErrorCodes at: error ifAbsent:  
>  >> ['Unknown']).
>  >> I am using a Logitech Quickcam (pretty recent model)

> Thats really good to know! (its time for me to start doing my own
> debugging...)    In this case the title window shows: "Error:
> DirectShow: True".   I don't see any error code numbers.  the debug file
> is interesting (I'm attaching here. in the future, I'll send to the
> croquet-dev)
>
> Josh, is this helpful?
>
> h
>  
> Haggai Goldfarb
> LiquidBits
> office: 617.945.5050
> cell: 818.648.5158
> [hidden email]
>
>
> ----- Original Message ----
> From: Howard Stearns <[hidden email]>
> To: haggai Goldfarb <[hidden email]>; [hidden email]
> Cc: Preston Austin <[hidden email]>; Joshua Gargus
> <[hidden email]>
> Sent: Tuesday, February 20, 2007 3:20:36 PM
> Subject: debugging, as applied to Web-cam video on PC
>
> I think Josh is asking what error is actually being reported by
> DirectShow. It
> looks like DShowVideoController>>reportError: is an error-reporting
> function
> that gets an error code by sending self decoderGetLastError. Then it
> tries to
> get the label for that code out of a Dictionary (what some languages
> call a hash
> table) named ErrorCodes.
>
> When it reported the error, what did it say in the title of the
> debugger? From
> the code is looks like it should have said: "DirectShow: " followed by the
> description that the error code maps to.
>
> By the way: Whenever you get an error, a reasonable compromise summary
> is saved
> to SqueakDebug.log in your Croquet directory. It has more details about the
> frames on top (closest to the error), and less detail further down. It's a
> convenient thing for attaching to a bug report or a message on the
> croquet-dev
> or squeak-dev lists.
>
> Also by the way: You can get more information out of the debugger
> itself. If
> click on the reportError: frame, you should see local variables listed
> below, in
> this case including 'error'. You can also highlight code and 'print-it',
> or even
> type in new code and 'print-it'.
>
>
> haggai Goldfarb wrote:
>  > Hey Josh,
>  >
>  > no problem.
>  >
>  > reportError
>  >
>  >     | error |
>  >     error := self decoderGetLastError.
>  >
>  >     self error: 'DirectShow: ', (ErrorCodes at: error ifAbsent:
>  > ['Unknown']).
>  >
>  > h
>  >
>  >  
>  > Haggai Goldfarb
>  > LiquidBits
>  > office: 617.945.5050
>  > cell: 818.648.5158
>  > [hidden email]
>  >
>  >
>  > ----- Original Message ----
>  > From: Joshua Gargus <[hidden email]>
>  > To: Howard Stearns <[hidden email]>
>  > Cc: haggai Goldfarb <[hidden email]>; Preston Austin
>  > <[hidden email]>
>  > Sent: Tuesday, February 20, 2007 2:40:28 PM
>  > Subject: Re: [croquet-consort] Re: [croquet-dev]
>  >
>  >
>  > What error is #reportError showing?
>  >
>  > Josh
>  >
>  >
>  > On Feb 20, 2007, at 11:31 AM, Howard Stearns wrote:
>  >
>  >  > ...
>  >  >
>  >  > I'll defer to the experts (Josh and Preston) on the camera. The  
>  >  > Windows camera plugin was written a few years ago by Squeaker  
>  >  > Yoshiki Ohshima. I know David Faught on the croquet-dev list has  
>  >  > also been working on issues with the Windows camera plugin. Last I  
>  >  > heard, he had it working except for uv-mapping. (He had a grid of  
>  >  > multiple copies of the image stretched across the surface.) I don't  
>  >  > know what errors he has encountered and fixed along the way.
>  >  >
>  >  > haggai Goldfarb wrote:
>  >  >> ... [using Web-cam video in KAT]...
>  >  >> One the webcam - I am getting an error from  
>  >  >> DShowVideoController>>reportError:
>  >  >> reportError
>  >  >>     | error |
>  >  >>     error := self decoderGetLastError.
>  >  >>     self error: 'DirectShow: ', (ErrorCodes at: error ifAbsent:  
>  >  >> ['Unknown']).
>  >  >> I am using a Logitech Quickcam (pretty recent model)
>
>

> Josh, Howard
>
> Looking some more at the DShowVideoController and  
> DShowVideoDecoderPlugin, I
> noticed that primDecoderRun executes a call to a c-function:
>
> ret := self cCode: 'DecoderRun()'.
>
> Is it possible that this c-function only exists in the wisconsin  
> library?
>
> Did I get this right?
>
>
> h

> I *believe* that Howard convinced the Committee to include the binary
> DShowVideoDecoderPlugin DLL.  Right, Howard?
>
> Josh
>
> On Feb 22, 2007, at 1:53 PM, haggai wrote:
>
>> Josh, Howard
>>
>> Looking some more at the DShowVideoController and
>> DShowVideoDecoderPlugin, I
>> noticed that primDecoderRun executes a call to a c-function:
>>
>> ret := self cCode: 'DecoderRun()'.
>>
>> Is it possible that this c-function only exists in the wisconsin library?
>>
>> Did I get this right?
>>
>>
>> h
>

> I *believe* that Howard convinced the Committee to include the binary
> DShowVideoDecoderPlugin DLL.  Right, Howard?
>
> Josh
>
> On Feb 22, 2007, at 1:53 PM, haggai wrote:
>
>> Josh, Howard
>>
>> Looking some more at the DShowVideoController and
>> DShowVideoDecoderPlugin, I
>> noticed that primDecoderRun executes a call to a c-function:
>>
>> ret := self cCode: 'DecoderRun()'.
>>
>> Is it possible that this c-function only exists in the wisconsin library?
>>
>> Did I get this right?
>>
>>
>> h
>